Lite-On is a manufacturer of electronic devices. So it could be something made by that device. Routers and network inspectors will usually list the manufacturer of the device and not the company or brand name you bought it under. A great personal example of this is when both Avast's Network inspector and my D-Link router listed Hon Hai Precision Ind. as a device on my network. It took me a couple of minutes to figure out it was my PS4.
So, if you haven't already, make a list of every device that you know of that connects to your Wi-Fi. Computer, laptop, phone, TV, game console, microwave, etc. Anything. If you live with family, friends, or roommates, or have guests over, take note of their devices as well. Then, if the number of connected devices you took note of matches the number of devices on your Network Inspector or your router, you're probably good. If the number doesn't match, or it does and you want to know which device is presented under which name, do a process of elimination by disconnecting all of your devices at once and reconnecting one by one to see which ones show up. You'll have to keep your computer connected in order to run the scan or check your router setting in your browser.
If you do all of that and you still find a device unaccounted for, change your Wi-Fi password and see if that gets rid of it.
